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OM-228 042 Page 43
12-2. Typical MIG Process Control Settings
. These settings are guidelines only. Material and wire type, joint design, fitup, position, shielding gas, etc. affect settings. Test welds to be sure
they comply to specifications.
. These settings are guidelines only. Material
and wire type, joint design, fitup, position,
shielding gas, etc. affect settings. Test welds
to be sure they comply to specifications.
1 Convert Material Thickness to
Amperage (A)
(.001 in = 1 ampere)
.125 = 125 A
. Material thickness determines weld
parameters.
2 Select Wire Size
3 Select Wire Speed (Amperage)
125 A based on 1/8 in (3 mm) material thickness.
(ipm = inch per minute)
. Wire speed (amperage) controls weld pene-
tration (wire speed = burn-off rate).
4 Select Voltage
Low Voltage: wire stubs into work
High Voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage.
. Voltage controls height and width of weld
bead.
804 476 / 229 573
1/8 or
.125 in
Wire
Suggested
.030 in
.035 in
.045 in
2 in per amp
1.6 in per amp
1 in per amp
Wire Speed
2 x 125 A = 250 ipm
1.6 x 125 A = 200 ipm
1 x 125 A = 125 ipm
Size (Approx.)
Amperage Range
40 − 145 A
50 − 180 A
75 − 250 A
Wire Size
.030 in
.035 in
.045 in
2
1
3
4